Calling wined3d_texture_bind() + context_invalidate_active_texture() is
equivalent to just calling wined3d_texture_bind_and_dirtify().

I missed this in 7c4d512f. Generally speaking,
the only places where plain wined3d_texture_bind() calls are appropriate are
places where you're binding the texture to a specific stage for a subsequent
draw. I.e., places where context_active_texture() is called first.

wined3d: Bind the texture before calling wined3d_volume_upload_data() in wined3d_volume_load_location().

On current hardware this generally only makes a difference for vertex
textures. This fixes a regression introduced by commit
c6232e1d.

wined3d: Use the display format if WINED3DFMT_UNKNOWN is passed as backbuffer format for windowed mode resets.

win2k supports it, winxp gives one error, vista+ gives another. This
isn't interesting behavior to test.